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A001862 as a simple table

n a(n)
0 1
1 1
2 2
3 7
4 26
5 111
6 562
7 3151
8 19252
9 128449
10 925226
11 7125009
12 58399156
13 507222535
14 4647051970
15 44747776651
16 451520086208
17 4761032807937
18 52332895618066
19 598351410294193
20 7102331902602676
21 87365859333294151
22 1111941946738682522
23 14621347433458883187

[1,1,2,7,26,111,562,3151,19252,128449,925226,
 7125009,58399156,507222535,4647051970,44747776651,
 451520086208,4761032807937,52332895618066,
 598351410294193,7102331902602676,
 87365859333294151,1111941946738682522,
 14621347433458883187]

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)